This wasn't a public party.
It was composed entirely of friends, and we were trying to get the barbarian to Act 3. I will admit though that one of our buddies' weapons were lacking (I did lend him my 800 DPS blue fist though), but even so it's kind of surprising how exponential the life leap became. It was like punching a freaking wall, which wasn't how my single-player experience with Belial went at all.